Spatulatta.com Classic Coffee Con You can freak someone out by arranging this "coffee spill" on their homework or important papers. The "coffee" takes a long time to dry - up to a week - so plan ahead. You'll need: 1-2 tablespoons brown puffy paint white glue empty coffee cup with lid waxed paper Equipment: A small paper cup A disposable spoon A little help from an adult or older sibling Mix the paint and glue together, then drip a little bit through the lid's spout, so it looks like it spilled out. Snap the lid onto the empty cup. Next, make a small puddle of the paint and glue mixture on the wax paper. Set the cup in the puddle, spout side down and let it dry thoroughly. This may take several days. Peel off of the wax paper and set on top of your Pop's tax return.